Device for mending pneumatic tires



(No Miodel.)

H. H. CUMMINGS 8u R. GOWEN. DEVICE FOR MENDIN'G PNEUMATIG TIRES.

No. 495,454. Patented Apr. 11, 1893.

\/\/|TN 55555: E lNvENTqUREI UNITED STATES PATENT OFFICE.

` HENRY H. CUMMINGS, OF MALDEN, AND ROBERT COVVEN, OF CAMBRIDGE,

MASSACHUSETTS.

`DEVICE FOR MENDING PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 495,454, dated April11, 1,893.

Application tiled June 13, 1892. Serial No. 436.425. (No model.)

To all whom it may concern..-

Be it known that we, HENRY H. CUMMINGs, of Malden, and ROBERT COW EN,ofCambridge, in the county of Middlesex and State of Massachusetts, haveinvented certain new and useful Improvementsin Devices for MendingPneumatic Bicycle-Tires, of which the followingis a specification.

This invention relates to that class of devices used for stopping holesor perforations accidentally made in pneumatic tires for bicycle wheels,in which a receptacle is employed, holding a quantity of mendingmaterial, said receptacle having a suitable nozzle adapted to be forcedinto an orifice in a pneumatic tire, and means for ejecting a quantityof the material through said nozzle, and thus stopping or plugging thehole into which the nozzle is inserted.

The invention hasfor its object to provide an improvedmeans for ejectingthe material from the nozzle under sufficient pressure to cause it toadequately plug the hole, and to this end it consists in theimprovementswhich we will now proceed to describe and claim.

Of the accompanying drawings, forming part of this specification: Figurel represents a side elevation of a tire-mending device, constructed inaccordance with our invention. Fig. 2 represents a longitudinal sectionof the same, showing parts of the device in elevation. Fig. 3 representsa longitudinal section of a portion of the device, showing in section apart that is shown in elevation in Fig. 2.

The same letters of reference indicate the same parts in all thefigures.

In the drawings: a represents a receptacle, preferably of cylindricalform, adapted to contain a quantity of viscid material, such as is usedfor stopping or plugging holes in pneumatic bicycle tires. Saidreceptacle is provided at one end with anozzle a which is of attenuatedform,and adapted to be inserted in a puncture or break in a bicycletire.

b represents a piston, which is fitted to move in the receptacle ot,and, when moved toward the nozzle a', is adapted to eject a portion ofthe viscid material from the receptacle a through said nozzle. Thepiston b is provided with a screw-threaded stem b', which is engagedwith an internally screw-threaded nut c.

Said nut is formed at its inner end to enter and slide lengthwise in thereceptacle a, and

is provided with a shoulder c2. The outer i portion of the nut cispreferably somewhat enlarged, and formed to be grasped and rotatedeither by the fingers or a suitable wrench.

Vd d represent levers, which are pivoted at d d to ears formed on thereceptacle a. Said levers are provided with short arms or projectionscl2, which are engaged with the shoulder c2 on the nut c, as shown inFigs. 2 and `3, the arrangement being such that, when the levers d d areswung inwardly or toward each other, the short arms or projections d2will exert a powerful pressure upon the shoulder c2 of the nut in thedirection required to force the piston a short distance toward thenozzle of thereceptacle ct. The nut constitutes a bearing for the shortarms or projections cl2 of the levers d, so that the inward movement ofsaid levers imparts an endwise movement to the nut, and through thelatter to the piston.

It will be seen that the engagement of the levers d cl with the nut c issuch that the nut can be readily rotated; consequently, when theoperator desires to use thedevice, he inserts the nozzle a in theorifice to be mended, then rotatesthe nut c until the piston bearsfirmly on the viscid material in the receptacle, and then applyingpressure to rthe levers d, swings said levers inwardly, thus giving thepiston a forward movement under strong pressure, and causing the cementto entirely fill or be forced under suitable pressure into the orifice.When the levers are released and swung outwardly the operator rotatesthe nut in the direction required to force the shoulder c2 of the nutback against the outwardly swung arms or projections d2 of the levers,and the levers are again enabled to impart an additional forwardmovement to the nut and piston. The operation is thus continued, thepiston being moved forward step by step, each adjustment of the nutenabling the levers to again move the piston forward until the materialhas been entirely used.

We do not limit ourselves to the details of construction here shown, andmay variously modify the same, Without departing from the spirit of theinvention. For example, a handle or hand-rest, rigidly connected to there- IOO e I l 495,45@

ceptacle ct may be substituted for one of the levers d, the other lever,engaged as described with the nut, being relied upon to impart thedesired additional movement to the nut and piston.

' We do not limit ourselves to the employment of the levers (Z d, as thedevice can be operated to eject the cementsimply by the rotation of thenut, although not with as much force as by the successive employment otthe nut and levers. In case the levers are not employed, some meanswould be required to prevent endwise movement of the nut, and permit itsfree rotation.

Ve claiml. A tire-inending device comprising a receptacle having` anattenuated outlet nozzle at one end, one or more power-applying leverspivoted to the receptacle, and a piston movable in the receptacle andprovided with an adjustable bearing for said levers whereby the leversmay be caused to advance the piston in the cylinder, step by step, asset forth.

2. In a tire-mending device, the `combination of a receptacle having anoutlet at one end, a piston movable in said receptacle and provided Witha screw-threaded shank, a nut engaged with said shank and having alimited endwise movement, and one or more levers pivoted to thereceptacle and engaged as described with the nut, whereby endwisepressure may be exerted on the nut, as set forth.

In testimony whereof we have signed our

